Automatic damper.



J. V. KAMMERS 8; J. H. BROPHY AUTOMATIC DAMPER.

APPLIOATION FILED MAR. 10. 1914.

L123,, Patented Jan. 5, 1915.

NURRIS PETERS CO. PHUTO-LITH l. WASHINGTON. D r

11W TTE @Ed FATE FFTE JOHN V. KAMMERS AND JAMES H. BROPHY, 0F LAMONT, WASHINGTON.

AUTOMATIC DAMPER.

Specification of Letters Patent.

Patented Jan. 5, 1915.

To 0 11 71 0m it may concern Be it known that we, JOHN V. KAMMnRs and James H. Brown, citizens of the United States, residing at Lamont, in the county of Whitman and State of Washington, have invented certain new and useful Improvements in Automatic Dampers, of which the following is a specification.

This invention relates to draft regulators,

and has for its object the utilization of a thermal rod to automatically turn the damper plate on its shaft so that the rise or fall of the heat will regulate the draft of the stove or furnace and thereby restore the heat to a predetermined medium. As a further object, the invention aims to provide means whereby movement of the damper plate may be regulated or adjusted through manipulation of suitable means disposed extericrly of the stove or furnace pipe within which the said damper plate is arranged.

The above and additional objects are accomplished by such means as are illustrated in their preferred embodiment in the accompanying drawings, described in the following specification and then more particularly pointed out in the claims which are appended hereto and form a part ofthis application.

In describing our invention in detail reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the sev eral views, and in which Figure 1 is a longitudinal vertical section of a stove pipe illustrating the arrangement of the mechanism comprising our invention therein; Fig. 2 is a similar view, the damper being closed; and Fig. 3 is a section transverse to that illustrated in the said Fig. 2.

Referring now to the drawings by numerals, 1 designates the pipe section within which the damper operating mechanism comprising the present invention is arranged. The said section 1 has secured upon its exterior surface a suitable bracket 2 supporting a thumb screw 3, the latter having connection with a second bracket 4 adjustable relative to the section 1 into which it extends through an opening 5. The said bracket 4 is attached to the pipe section 1 through the medium of rivets 6 operating within slots 7 of the said pipe section to provide in this manner for the adjustment of the bracket 4 through manipulation of the thumb screw 3 aforesaid.

A metal rod 8 is threaded at one end into an extension 9 of the bracket 4, said rod extending diagonally across the bore of the stove pipe to a point 10 where it is pivotally connected to an operating lever 11. Said lever 11 is in turn pivoted as at 12 to a bracket 13 rigid with the pipe section 1. The free end of the lever 11 is loosely attached as at 14 to a connecting rod 15 the opposite end of which is loosely connected as at 16 to a substantially L-shaped rod 17, one end of which is rigid with the damper plate 18, the latter being mounted for rctation upon a shaft 19 extending transversely of the pipe secticn 1 and exteriorly thereof to provide for manual operation, when desired, through manipulation of a suitable thumb nut 20.

The rod 17 is connected to the damper plate adjacent the shaft 19 and in close proximity to the opposite wall of the pipe section 1 to that supporting the bracket 13, this arrangement, during movement of the lever 11, causing the damper plate to be partially rotated through a. slight movement of the said lever from its pivot point 12. An arm 21. extends at an angle from the lever 11 to serve as a stop means whereby movement of the plate 18 is limited. Assuming that the damper 18 is closed, the same is automatically opened or adjusted as the heat within the pipe diminishes to such a degree as to cause the thermal rod 8 to contract. Contraction of the rod 8 will cause lever 11 to be moved or swung upon its pivot 12, thereby exerting a pull upon rod 15 and rod 17, and, the latter being rigid with the damper 18 will cause same to open until in engagement with stop arm 21. The damper being open. a reverse movement thereof is automatically controlled as the heat within the stove pipe increases, such increase causing rod 8 to expand and lever 11 to move from the position indicated in Fig. 1 to the position indicated in Fig. 2 whereby said damper plate 18 is returned to its normal closed position. Adjustment of the rod 8 may be effected through manipulation of the thumb screw 3, as it is apparent upon reference to Fig. 1 that the bracket 4 may be adjusted relatively to the pipe section 1, the terminals of the slots 7 limiting movement of said bracket in an adjusting operation.

From the above, taken in connection with the accompanying drawings, it will be noted that the pivot point 10 is adjacent the pivot point 12 of the lever 11, this disposition of the said connection indicated at 10 causing the slightest movement of the rod 8 to transmit a greater movement to lever 11 whereby to sufliciently rotate damper plate 18 to provide for the proper adjustment in the automatic manner above noted.

In reduction to practice, we have found that the form of ourinvention, illustrated in the drawings and referred to in the above description, as the preferred embodiment, is the most eflicient and practical; yet realizing that the conditions concurrent with the adoption of our device will necessarily vary, we desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of our invention, as defined in the appended claims.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is 2-- 1. In a damper regulator, the combination with a pipe, the said pipe having an opening formed therein, of a damper plate turnable within the pipe, a support for the damper plate extending across the pipe, a pivoted lever actuatable to move the plate, a stop on the lever engageable with the plate to limit its movement, a thermal rod Within the pipe, said rod being connected with the leveradjacent its pivot point, said rod extending across the pipe upon the interior thereof to a point adjacent the opening therein, a member to which the rod is afiixed, said member extending through the opening aforesaid, and means on the exterior of the pipe engageable with the extended portion of said member, as and for the purpose set forth.

2. A damper regulator including av damper plate, a damper shaft upon which the damper is mounted, a knob upon one end of the shaft and exteriorly of the pipe within which the damper is arranged, a rod bent intermediate its ends and attached to the damper plate, a connecting rod loosely at tached to said bent rod, an operating lever pivoted to the pipe, said lever normally extending parallel with the damper shaft, said lever being pivotally connected at its free end to said connecting rod, stop means comprising an arm rigid with the lever and extending into the path of movement of the damper plate to limit movement thereof when actuated, a thermal rod extending at an angle to the longitudinal axis of the pipe, said rod being pivoted at one end to said lever adjacent its pivot point, a bracket adjustable longitudinally relatively to the pipe, said thermal rod being adj ustably connected to said bracket, an extension integral with the bracket and projecting exteriorly of the pipe through a slot therein, the ter-' minals of the said slot limiting movement of said bracket, and means operating exteriorly of the pipe for adjusting said bracket, as and for the purpose set forth.

In testimony whereof we aliix our signatures in presence of two witnesses.

JOHN V. KAMMERS. JAMES H. BROPHY. Witnesses:

B. J. ELLIS, l/VILL R. HEGLAN.

Copies of this patent may be obtained. for five cents each. by addressing the Commissioner of Patents. Washington, D. G. 

